6个东方百合品种的染色体核型分析

Karyotype analysis on 6 cultivars of Oriental Lilies

采用染色体常规制片技术，对Parasol、Corvara等6个东方百合品种进行了染色体形态研究。结果表明：Parasol的核型公式为2n=24=8m（1SAT）＋6sm（1SAT）＋6st（1SAT）＋4t，Corvara的核型公式为2n=24=6m（1SAT）＋8sin（3SAT）＋8st（2SAT）＋2t．Lido的核型公式为2n=24=6m＋6sm＋12st（2SAT），Alessia的核型公式为2n=24=12m（3SAT）＋4sm（2SAT）＋Sst，Anaise的核型公式为2n：24=lOm＋8sm＋6st，Crystal Blanca的核型公式为2n=24=14m（4SAT）＋4sm＋6st。Alessia、Anaise和CrystalBlanca3个品种的核型类型为2B型，核型不对称系数范围为64．81％-66．1％；Corvara和Lido的核型为3B型．核型不对称系数范围为70．71％-70．74％：corvara的核型为2A型，核型不对称系数为70．3％。除Anaise外，其他5个品种的染色体均有随体，其中3个品种的第2对染色体上均携有随体。

The karyotypes of 6 oriental cultivars of lily were studied using traditional squash method. The results indicated as follows： （1） The karyotype of ＇Parasol＇ was 2n=24=8m（1SAT）＋6sm（1SAT）＋6st（1SAT）＋4t, the karyotype of ＇Corvara＇ was 2n=24=6m（1SAT）＋Ssm （3SAT）＋8st（2SAT）＋2t, the karyotype of ＇Alessia＇ was 2n=24=12m（3SAT）＋4sm（2SAT）＋8st, the karyotype of ＇Anaise＇ was 2n=24=10m＋ 8sm＋6st, the karyotype of ＇Crystal Blanea＇ was 2n=24=14m（4SAT）＋4sm＋6st. （2） The karyotype of ＇Alessia＇, ＇Anaise＇ and ＇Crystal Blanca＇ belonged to 2B, and the asymmetry index was 70.71%-70.74%; the karyotype of ＇Corvara＇ and ＇Lido＇ belonged to3B, and the asymmetry index was 70.71%~70.74%; the karyotype of ＇Corvara＇ belonged to 2A, and the asymmetry index was 70.3%. （3） The secondary constriction was observed in five other cultivars except ＇Anaise＇, the secondary constriction was located on the second pairs of chromosomes in three cuhivars.